模糊综合评价方法在边坡岩体卸荷程度分级中的应用  

Application of Fuzzy Synthesis Assessment Method in Classification of Slope Rock Unloading

作　　者：王泉伟[1] 刘建磊[1] 杜朋召 WANG Quanwei LIU Jianlei DU Pengzhao(Yellow River Engineering Consulting Co. , Ltd. , Zhengzhou 450003, Chin)

机构地区：[1]黄河勘测规划设计有限公司,河南郑州450003

出　　处：《华北水利水电大学学报（自然科学版）》2016年第6期89-92,共4页Journal of North China University of Water Resources and Electric Power：Natural Science Edition

摘　　要：岩体卸荷特征是岩质边坡质量分级的重要影响因素,也是进行边坡稳定性分析评价的主要内容之一。为研究岩质边坡岩体的卸荷特征,基于模糊数学理论,选取卸荷裂隙总条数、卸荷裂隙累计宽度、岩石质量指标RQD、岩体透水率、岩体波速比等要素作为评判指标,采用数值特征分析和模糊统计方法确定岩体的隶属度函数,同时采用要素比较矩阵法确定各要素的权重,建立岩体卸荷等级的模糊综合评判模型来对岩体卸荷情况进行评价。运用该法对某水电站坝肩边坡岩体卸荷程度分级情况进行了研究。结果表明,该模糊综合评判研究结果与边坡卸荷特征实际情况基本一致,说明该评价方法用在边坡岩体卸荷程度分级评判方面是可行的。Characteristics of unloading is one of the important factors that affecting quality classification of rock slope, which is also one of the main content of the slope stability analysis and evaluation. Based on the theory of fuzzy mathematics, the five more important influential factors for quality classification of rock slope such as the number of all unloading fissures, the cumulative width of unloading fissures, RQD, rock mass permeability and the ratio of rock mass velocity, are chosen; then, the numerical characteristics analysis and fuzzy statistical method are used to determine the membership function, and the weights of each factor are determined with comparison matrix method. Thus fuzzy comprehensive evaluation model has been established. Finally, the paper rescarches the unloading classification of shoulder slope for a hydropower station dam, which shows that the results of fuzzy comprehensive evaluation are basically in accord with characteristics of slope unloading, so the evaluation method is reasonable in the aspect of the unloading classification for slope rock mass, and has good applicability.

关 键 词：岩质边坡 模糊数学 综合评判法 卸荷程度分级 

分 类 号：TV221[水利工程—水工结构工程]